Cyst Tech® products are mixtures or blends of seed from two or more soybean varieties.
According to the company, Cyst Tech® level A (CTA) is a blend of seed of both SCN-susceptible and SCN-resistant varieties and Cyst Tech® level B (CTB) is a blend of seed from two or more SCN-resistant soybean varieties.
The United States Patent Application for Cyst Tech® indicates that Cyst Tech® is
- A method of controlling cyst nematode population in soybeans by providing a blended composition of soybean varieties. At least one of the soybean varieties in the blend has resistance to a given race spectrum, while another of the soybean varieties in the blend may have resistance to a differing race spectrum or be a susceptible variety. The blend may include 10 to 90% of the first variety and 90 to 10% of the second variety. The blend may consist of three or more soybean varieties.
- CTA is a blend of both resistant and susceptible soybean varieties. CTB is a blend of resistant varieties for one or more SCN races.
Click here to read the United States Patent 7,241,938 titled Process for controlling cyst nematode population in soybeans, which describes Cyst Tech®.